Determine if the graph of the function is concave up or concave down.y = -x2 + 1
A. Concave up
B. Concave down
Answer: B
Mathematics
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Find the unknown length in the right triangle. If necessary, approximate the length to the nearest thousandth.
16 km
A. 16.763 km B. 10.5 km C. 140.5 km D. 281 km
Mathematics
Multiply.-5x(-11x - 9)
A. 100x2 B. 55x2 - 9x C. -11x2 + 45x D. 55x2 + 45x
Mathematics
Solve the right triangle. If two sides are given, give angles in degrees and minutes.
A = 11° 14', c = 247 ftRound side lengths to two decimal places.
A. B = 79° 45'; a = 48.12 ft; b = 238.27 ft B. B = 78° 46'; a = 48.12 ft; b = 242.27 ft C. B = 78° 45'; a = 51.32 ft; b = 243.47 ft D. B = 78° 46'; a = 47.55 ft ; b = 241.38 ft
Mathematics
Solve.- 
x = -63
A. - 1 B. -81 C. 1 D. 81
Mathematics